X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/18258f6a3762ba7d83b05260b3c22f71423c0373..9ae866579b9e62ac11817b8053aaae74be7ea1cf:/doc/Gemfile

diff --git a/doc/Gemfile b/doc/Gemfile
index 381b706763..061fa7585a 100644
--- a/doc/Gemfile
+++ b/doc/Gemfile
@@ -1,6 +1,10 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: CC-BY-SA-3.0
+
 source 'https://rubygems.org'
 
 gem 'zenweb'
-gem 'liquid'
+gem 'liquid', '~>4.0.0'
 gem 'RedCloth'
-gem 'colorize'
\ No newline at end of file
+gem 'colorize'